Nodding Dog Script Swishmax 4

onFrame (1) {
bobbing_range = 30; 
nodding_range = 20; 
bobbing_hit = .5; 
nodding_hit = .1; 
bobbing_damp = .99;
nodding_damp = .985;
bobbing_angle = 0;
nodding_angle = 0;
bobbing_force = 0;
nodding_force = 0;
head_origin = head._y;
head.onEnterFrame = function(){
    if (bobbing_force){
        this._y = head_origin + Math.sin(bobbing_angle)*bobbing_force*bobbing_range/2;
        bobbing_angle += bobbing_hit*bobbing_force;
        bobbing_force *= bobbing_damp;
    } 
    if (nodding_force){
        this._rotation = Math.sin(nodding_angle)*nodding_force*nodding_range/2;
        nodding_angle += nodding_hit*nodding_force;
        nodding_force *= nodding_damp;
    }
}
head.onPress = function(){
    bobbing_angle = nodding_angle = 0;
    bobbing_force = nodding_force = 1;
}
}